Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 843 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07653321Enrolling by invitation
Kidney injury in critically ill patients
This study looks at acute kidney injury in patients who are very sick in the intensive care unit (ICU). It may help doctors better understand and manage kidney problems in these patients.
BeijingAges 18 years+ - NCT07642401Enrolling by invitation
Building models to understand esophageal cancer
This research study uses medical records and imaging from patients with various esophageal conditions—from inflammation to cancer—to develop better diagnostic and prediction tools. Researchers want to understand what changes in the esophagus lead to cancer and how to catch it earlier.
Anyang, HenanAges 18–90 - NCT07603232Enrolling by invitation
Long-Term Health Outcomes in Children With Hirschsprung's Disease or Anorectal Malformations
This study follows children who were born with Hirschsprung's disease (a condition affecting the nerves in the colon) or anorectal malformations (differences in how the rectum or anus formed) to understand how they do over time. Researchers will track health outcomes and quality of life to help improve care for future children with these conditions.
Montreal, QuebecAges Up to 18 years - NCT07590882Enrolling by invitation
Sports Recovery After Hip Realignment Surgery
This study follows patients who had hip socket realignment surgery (PAO) to understand how well they return to sports and physical activities. Researchers will review medical records from the past 7+ years to learn what helps patients get back to the sports they love.
BolognaAges 12–40 - NCT07544290Enrolling by invitation
Autoimmune Hyperthyroidism Study in Young Children
This study looks at children with autoimmune hyperthyroidism (an overactive thyroid caused by the immune system attacking the thyroid gland). Researchers want to understand this condition better in children before puberty to help improve care.
Milan, ItalyAges 2–18 - NCT07424976Enrolling by invitation
Early brain injury detection after infant heart surgery
This study looks for early signs of brain injury in infants after heart surgery that uses a heart-lung machine. It aims to improve monitoring and care for babies with congenital heart disease.
LjubljanaAges 1 week–1 year - NCT07397390Enrolling by invitation
Study of a new scoring balloon for leg artery blockages with heavy calcium buildup
This study tests a new balloon device that scores the artery walls to treat leg artery blockages with heavy calcium deposits. It aims to see if the device helps prepare the vessel safely and effectively before placing a stent.
Dalian, LiaoningAges 18–85 - NCT07383298Enrolling by invitation
Lower dose of olverembatinib for chronic myeloid leukemia
This study looks at whether lowering the dose of olverembatinib (from 30 or 40 mg to 20 mg every other day) keeps working well for people with chronic myeloid leukemia who have already had a good response. It aims to see if a lower dose can still control the cancer while possibly reducing side effects.
Beijing, Beijing MunicipalityAges 18 years+ - NCT07349914Enrolling by invitation
Shoulder Pain and Function with Heart Devices
This study looks at shoulder pain and how well the shoulder works in people who have a heart device like a pacemaker. It aims to understand if having the device affects shoulder function over time.
Ankara, SamanpazariAges 18 years+ - NCT07339007Enrolling by invitation
Validating a heart ultrasound training program for family doctors
This study tests whether a training program helps family doctors use a focused heart ultrasound (FoCUS) to assess patients. If you need a heart ultrasound as part of your regular care, you may be able to join.
Barcelona, CataloniaAges 15 years+ - NCT07314190Enrolling by invitation
Blood tests for brain diseases and mental health conditions
This study looks at blood tests to help diagnose and track brain diseases (like Alzheimer's) or mental health conditions. It compares patients to healthy volunteers to find better ways to detect and monitor these illnesses.
BarcelonaAges 18 years+ - NCT07254208Enrolling by invitation
Long-term study for those who took PBGENE-HBV
This study follows people who have already received the experimental gene therapy PBGENE-HBV for hepatitis B. It aims to monitor long-term safety and health outcomes.
Boston, MassachusettsAges 19–80 - NCT07253909Enrolling by invitation
Arm function in heart failure with ICD or CRT devices
This study looks at how well people with heart failure and certain heart devices (ICD or CRT) can use their arms and hands. It aims to understand if these devices affect upper body function.
Ankara, SamanpazarıAges 18 years+ - NCT07239843Enrolling by invitation
Study of blood markers and mental health in brain diseases
This study looks at how social factors and blood markers relate to psychiatric symptoms in people with brain diseases or mental disorders. It aims to find new ways to understand and diagnose these conditions.
Barcelona, BarcelonaAges 18 years+ - NCT07238049Enrolling by invitation
Real-world dementia outcomes: an observational study
This study follows people with memory or thinking problems over time to learn more about how these conditions progress. It's an observational study, meaning no new treatments are tested—just information is collected from your regular care.
BangorAges 45 years+ - NCT07129005Enrolling by invitation
MRI-based tool to tell uterine sarcoma from fibroids
This trial uses MRI scans to see if a computer can tell the difference between uterine sarcoma (a rare cancer) and fibroids (non-cancerous growths). If you've already been diagnosed with one of these and had an MRI before surgery, you may be able to help.
Wuhan, HubeiAges 18 years+ - NCT07122180Enrolling by invitation
14-day study of a new continuous glucose monitor for diabetes
This study tests a new continuous glucose monitor (CGM) that you wear for 14 days. It checks how accurate the device is and how well it helps track your blood sugar levels, all while being safe and easy to use.
Riga, RigaAges 18–80 - NCT07064369Enrolling by invitation
Thyroid tumor study: new predictive factors
This study looks at different types of thyroid tumors to find new factors that might help predict how the disease will progress or respond to treatment. If you have been diagnosed with a thyroid tumor, you may be able to join.
RomaAges 18 years+ - NCT07055607Enrolling by invitation
Real-world study of Wegovy for weight management
This study observes how Wegovy works in everyday medical practice for people who are starting it for the first time. It will help doctors learn more about its real-life benefits and safety.
BarcelonaAges 18 years+ - NCT07007897Enrolling by invitation
Cataract treatment observation study
This study is for people with cataracts who are planning to get treatment. It will observe your eye health and treatment process without giving you any new medicine.
Mesa, ArizonaAges 21 years+ - NCT06935773Enrolling by invitation
Simulation training for ICU and emergency nurses
This trial tests whether high-fidelity simulation training improves skills for nurses in acute care. Nurses with at least 3 months of experience in critical care and ACLS training can join.
Changhua, LukangAges 20–65 - NCT06874920Enrolling by invitation
Antibiotic choice based on hospital lab reports in transplant patients with bloodstream infection
This study looks at whether choosing antibiotics based on local hospital lab reports (antibiograms) works well for organ transplant patients who have a single bacteria in their bloodstream. It hopes to find the best way to treat these infections.
MilanAges 18 years+ - NCT06837402Enrolling by invitation
Non-invasive ventilation in Argentine ICUs: an observational study
This study looks at how non-invasive breathing support (like a mask or machine) is used in ICUs across Argentina. It helps doctors understand patterns of care so they can improve treatment for patients with breathing problems.
CABA, Buenos AiresAges 18 years+ - NCT06807515Enrolling by invitation
Safety study of FL Nourish supplement for cancer survivors in remission
This study is testing whether a natural herbal supplement called FL Nourish Capsules is safe for people who have had cancer and are now in remission. It focuses on those with a Traditional Chinese Medicine pattern of Qi deficiency and Blood stasis, which may cause tiredness and poor circulation.
Singapore, SGAges 21–80
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 843 recruiting observational study studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a observational study trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a observational study trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.